Fig. 6From: Imperforated cor triatriatum dexter in a dog with concurrent caudal vena cava wall mineralizationThis figure demonstrates the flow of oxygenated blood from the sinus venosus into the left atrium (arrows) and components of the right sinus venosus valve after regression. Regression failure of the Eustachian valve (hatched), results in separation of the caudal vena cava from the right atrium (RA)Back to article page